docs: Add Panopticum Phase 1 - Sovereign Indexes and layer docs

Non-breaking changes to align with Panopticum repository architecture:

- Add Sovereign Indexes (l0_transport.zig, l1_identity.zig)
  - Single import point for each layer
  - Re-export all layer modules

- Add layer README files
  - l0-transport/README.md: LWF and Time documentation
  - l1-identity/README.md: All L1 components documented
  - AI-friendly, colocated documentation

- Update root README.md
  - Add Sovereign Index usage examples
  - Update L0 component list

Benefits:
- Simplified imports: `const l0 = @import("l0_transport.zig");`
- Self-contained layer documentation for AI agents
- Zero breaking changes (existing imports still work)

Phase 1 complete. Deferred: Feature folders, colocated tests (Phase 2-3)

README.md

@@ -68,16 +68,25 @@ The Libertaria SDK provides the foundational L0 (Transport) and L1 (Identity/Cry
 ## Layers
 
 ### L0: Transport Layer
-**Module:** `l0-transport/`
+**Module:** `l0-transport/` | **Index:** `l0_transport.zig`
 
 Implements the core wire protocol:
-- **LWF Frame Codec** - Encode/decode wire frames
+- **LWF Frame Codec** - Encode/decode wire frames (RFC-0000, 72-byte header)
-- **UTCP** - Reliable transport over UDP (future)
+- **Sovereign Time** - L0 transport timestamps (u64 nanoseconds)
 - **Frame Validation** - Checksum, signature verification
-- **Priority Queues** - Traffic shaping
+- **Priority Queues** - Traffic shaping (future)
 
 **Key Files:**
+- `l0_transport.zig` - **Sovereign Index** (re-exports all L0 modules)
 - `lwf.zig` - LWF frame structure and codec
+- `time.zig` - Time primitives
+
+**Quick Start:**
+```zig
+const l0 = @import("l0_transport.zig");
+var frame = try l0.lwf.LWFFrame.init(allocator, 1024);
+frame.header.timestamp = l0.time.nowNanoseconds();
+```
 - `utcp.zig` - UTCP transport (future)
 - `validation.zig` - Frame validation logic
 

l0-transport/README.md

@@ -0,0 +1,78 @@
+# L0 Transport Layer
+
+**Layer:** L0 (Transport)  
+**Purpose:** Wire protocols, frame encoding, time primitives  
+**RFCs:** RFC-0000 (LWF), RFC-0105 (Time L0 component)
+
+---
+
+## Overview
+
+The L0 Transport layer provides low-level wire protocol implementations for the Libertaria network. It handles packet framing, serialization, and transport-layer timestamps.
+
+## Components
+
+### LWF (Libertaria Wire Frame) - `lwf.zig`
+**RFC:** RFC-0000  
+**Size:** 72-byte header + payload + 36-byte trailer
+
+Wire protocol implementation with:
+- Fixed 72-byte header (24-byte DID hints, u64 nanosecond timestamp)
+- Variable payload (1092-8892 bytes depending on frame class)
+- 36-byte trailer (Ed25519 signature + CRC32 checksum)
+- Frame classes (Constrained, Standard, Ethernet, Bulk, Jumbo)
+
+**Key Types:**
+- `LWFHeader` - 72-byte fixed header
+- `LWFTrailer` - 36-byte signature + checksum
+- `LWFFrame` - Complete frame wrapper
+- `FrameClass` - Size negotiation enum
+
+### Time - `time.zig`
+**RFC:** RFC-0105 (L0 component)  
+**Precision:** u64 nanoseconds (584-year range)
+
+Transport-layer time primitives:
+- `u64` nanosecond timestamps for drift detection
+- Monotonic clock access
+- Replay protection timestamps
+
+**Note:** L1 uses full `SovereignTimestamp` (u128 attoseconds) for causal ordering.
+
+---
+
+## Usage
+
+```zig
+const l0 = @import("l0_transport.zig");
+
+// Create LWF frame
+var frame = try l0.lwf.LWFFrame.init(allocator, 1024);
+defer frame.deinit(allocator);
+
+// Set header fields
+frame.header.service_type = 0x0700; // Vector message
+frame.header.timestamp = l0.time.nowNanoseconds();
+
+// Encode for transport
+const encoded = try frame.encode(allocator);
+defer allocator.free(encoded);
+```
+
+---
+
+## Testing
+
+Run L0 tests:
+```bash
+zig test l0-transport/lwf.zig
+zig test l0-transport/time.zig
+```
+
+---
+
+## Dependencies
+
+- `std.mem` - Memory management
+- `std.crypto` - CRC32, hashing
+- `std.time` - System time access

l0_transport.zig

@@ -0,0 +1,11 @@
+const std = @import("std");
+
+// Re-export LWF (Libertaria Wire Frame)
+pub const lwf = @import("l0-transport/lwf.zig");
+
+// Re-export Time primitives
+pub const time = @import("l0-transport/time.zig");
+
+test {
+    std.testing.refAllDecls(@This());
+}

l1-identity/README.md

@@ -0,0 +1,131 @@
+# L1 Identity Layer
+
+**Layer:** L1 (Identity)  
+**Purpose:** Decentralized identity, cryptography, trust graphs, vectors  
+**RFCs:** RFC-0105 (Sovereign Time), RFC-0120 (QVL)
+
+---
+
+## Overview
+
+The L1 Identity layer provides cryptographic identity primitives, trust relationship management, and the QuasarVector Lattice (QVL) for event-driven consensus.
+
+## Components
+
+### DID (Decentralized Identifiers) - `did.zig`
+**Spec:** `did:libertaria:...` format
+
+DID generation and parsing:
+- Blake3-based DID derivation from public keys
+- 24-byte routing hints (192-bit)
+- Base58 encoding for human readability
+
+### SoulKey (Identity Keys) - `soulkey.zig`
+**Crypto:** Ed25519
+
+Core identity keypair management:
+- Key generation, storage, derivation
+- Signing and verification
+- Seed phrase support
+
+### QuasarVector - `vector.zig`
+**RFC:** RFC-0120
+
+Event lattice vectors:
+- Ed25519 signatures
+- `SovereignTimestamp` (u128 attoseconds)
+- Proof-of-Path integration
+- Vector validation pipeline
+
+### TrustGraph - `trust_graph.zig`
+**Pattern:** Web-of-trust
+
+Decentralized trust relationships:
+- Trust grant/revoke operations
+- Path finding (Dijkstra)
+- Trust weight calculation
+- Graph serialization
+
+### ProofOfPath - `proof_of_path.zig`
+**RFC:** RFC-0120
+
+Trust path verification:
+- Multi-hop signature chains
+- Path expiration checking
+- Hop limit enforcement
+
+### Entropy - `entropy.zig`
+**RFC:** RFC-0100
+
+Entropy stamps for Sybil resistance:
+- Blake3-based proof-of-work
+- Difficulty calibration (0-255)
+- Verification logic
+
+### Crypto - `crypto.zig`
+Cryptographic primitives wrapper:
+- Ed25519 (signing)
+- X25519 (key exchange)
+- Blake3 (hashing)
+- XChaCha20-Poly1305 (encryption)
+
+### Argon2 - `argon2.zig`
+**FFI:** C library wrapper
+
+Password hashing:
+- Argon2id for SoulKey seed derivation
+- Memory-hard KDF
+
+### PQXDH - `pqxdh.zig`
+**Protocol:** Post-Quantum Extended Diffie-Hellman
+
+Future-proof key exchange:
+- Hybrid classical + PQ security
+- X25519 + Kyber integration (planned)
+
+### PreKey - `prekey.zig`
+**Protocol:** X3DH prekey bundles
+
+Asynchronous messaging:
+- Prekey bundle generation
+- Signal-style forward secrecy
+
+---
+
+## Usage
+
+```zig
+const l1 = @import("l1_identity.zig");
+
+// Generate identity
+const soulkey = try l1.soulkey.SoulKey.generate(allocator);
+const did = try l1.did.fromPublicKey(&soulkey.public_key);
+
+// Create vector
+var vector = try l1.vector.QuasarVector.create(allocator, soulkey, payload_data);
+defer vector.deinit(allocator);
+
+// Sign and verify
+try vector.sign(soulkey);
+const valid = vector.verifySignature();
+```
+
+---
+
+## Testing
+
+Run L1 tests:
+```bash
+zig build test
+# Or individual modules:
+zig test l1-identity/vector.zig
+zig test l1-identity/trust_graph.zig
+```
+
+---
+
+## Dependencies
+
+- `std.crypto` - Ed25519, X25519, Blake3
+- `vendor/argon2/` - Argon2 C library
+- L0 Time (`time.zig`) - SovereignTimestamp

l1_identity.zig

@@ -0,0 +1,17 @@
+const std = @import("std");
+
+// Re-export Identity modules
+pub const did = @import("l1-identity/did.zig");
+pub const soulkey = @import("l1-identity/soulkey.zig");
+pub const vector = @import("l1-identity/vector.zig");
+pub const trust_graph = @import("l1-identity/trust_graph.zig");
+pub const proof_of_path = @import("l1-identity/proof_of_path.zig");
+pub const entropy = @import("l1-identity/entropy.zig");
+pub const crypto = @import("l1-identity/crypto.zig");
+pub const argon2 = @import("l1-identity/argon2.zig");
+pub const pqxdh = @import("l1-identity/pqxdh.zig");
+pub const prekey = @import("l1-identity/prekey.zig");
+
+test {
+    std.testing.refAllDecls(@This());
+}